Leases (Lease-Related Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases	$ 4,229	$ 3,622
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for finance leases	48	65
Cash paid for amounts included in the measurement of lease liabilities: Financing cash flows for finance leases	1,236	1,187
Right-of-use assets obtained in exchange for recorded lease obligations: Operating leases	6,759	4,825
Right-of-use assets obtained in exchange for recorded lease obligations: Finance leases	$ 35	$ 1,243